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KR890015251A - Coil switching device - Google Patents

Coil switching device Download PDF

Info

Publication number
KR890015251A
KR890015251A KR1019890003291A KR890003291A KR890015251A KR 890015251 A KR890015251 A KR 890015251A KR 1019890003291 A KR1019890003291 A KR 1019890003291A KR 890003291 A KR890003291 A KR 890003291A KR 890015251 A KR890015251 A KR 890015251A
Authority
KR
South Korea
Prior art keywords
diode
coil
voltage
switching device
voltage source
Prior art date
Application number
KR1019890003291A
Other languages
Korean (ko)
Inventor
뮈니에 띠에르
자파르 장-뤼크
Original Assignee
엘리자베드-아비쯔
에스지에스-톰슨 마이크로일랙트로닉스 에스.에이.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘리자베드-아비쯔, 에스지에스-톰슨 마이크로일랙트로닉스 에스.에이. filed Critical 엘리자베드-아비쯔
Publication of KR890015251A publication Critical patent/KR890015251A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/125—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams conditioned by the operating function of the apparatus
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing

Landscapes

  • Electronic Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Digital Magnetic Recording (AREA)
  • Discharge Heating (AREA)
  • Details Of Television Scanning (AREA)
  • Vehicle Body Suspensions (AREA)
  • Details Of Aerials (AREA)
  • Relay Circuits (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

The invention relates to a device for switching a coil between a first state in which it is connected between a supply source and earth via an impedance, and a second state in which it is connected between an output terminal and earth, a first switch (TREC) being arranged between the said output terminal and the supply source. This switching device comprises: a diode (14) connected between the said output terminal (16) and the said supply source, a controlled interruptor (TPB) connected in parallel with the said impedance between a second terminal of the coil and earth, and a means of detection and of control (20, 24) connected between the diode and the supply source for detecting the instant at which the potential between the diode and earth becomes equal to a predetermined value which is lower than the direct voltage drop across the terminals of the diode, and for then operating the said interruptor. <IMAGE>

Description

코일 스위칭 장치Coil switching device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 본 발명의 일실시예를 블록 다이어그램 형태로 나타낸 부분도. 제 2A, 2B, 2C도는 제 1 도의 회로동작에 대한 이해를 돕기위한 시간도표.1 is a partial diagram showing an embodiment of the present invention in the form of a block diagram. 2A, 2B, and 2C are time charts to assist in understanding the circuit operation of FIG.

Claims (5)

출력단자(16)와 전압원 사이에 연결된 다이오우드(14)와, 코일의 제 2 단자와 접지사이에 있는 임피던스와 병렬로 연결된 조정스위치(TPB)와, 다이오우드와 접지사이에 흐르는 전압이 다이오우드를 통하는 순방향 전압 강하보다 낮은 선결정치와 동등하게 될때의 시간을 검출하고 그러므로써 스위치를 제어하는 전압원과 다이오우드 사이에 연결된 검출 및 조정수단(20, 24)으로 구성하고, 제 1 스위치(TREC)를 출력단자와 전압원 사이에 배열한, 코일이 임피던스를 통해 전압원과 접지사이에 연결되는 제 1 상태와 코일이 출력단자와 접지사이에 연결되는 제 2 상태 사이에서 코일이 스위칭 되게하는 것을 특징으로 하는 코일 스위칭 장치.The diode 14 connected between the output terminal 16 and the voltage source, the control switch TPB connected in parallel with the impedance between the second terminal of the coil and ground, and the voltage flowing between the diode and ground are forwarded through the diode. A detection and adjustment means 20, 24 connected between the diode and the voltage source controlling the switch and thus detecting the time when it becomes equal to a predetermined value lower than the voltage drop, and the first switch TREC is connected to the output terminal. And a coil switching device arranged between the voltage source, the coil being switched between a first state in which the coil is connected between the voltage source and ground through an impedance and a second state in which the coil is connected between the output terminal and ground. 제 1 항에 있어서, 검출 및 조정수단이 전압원의 전압과 다이오우드의 순방향 전압 강하보다 낮은 선결정 전압(VREF)을 비교하는 비교기(20)로 구성되어 있는것을 특징으로 하는 코일 스위칭 장치.The coil switching device according to claim 1, wherein the detecting and adjusting means comprises a comparator (20) for comparing the voltage of the voltage source and the predetermined voltage (VREF) lower than the forward voltage drop of the diode. 제 1 항에 있어서, 전압원이 시정수회로(5,6)를 통해 다이오우드에 연결되고, 제 1 스위치(TREC)가 전압원과 상기 시정수회로 사이에 배열되어 있음을 특징으로 하는 코일 스위칭 장치.2. A coil switching device according to claim 1, wherein a voltage source is connected to the diode via a time constant circuit (5,6) and a first switch (TREC) is arranged between the voltage source and the time constant circuit. 제 3 항에 있어서, 일단 제 1 스위치(TREC)가 OFF로 스위치되고 상기 회로상에 흐르는 전압이 다이오우드의 드레시 홀드 전압에 도달하게 되면, 시정수 회로를 방전시키는 수단(22)으로 구성되어 있는것을 특징으로 하는 코일 스위칭 장치.4. The device according to claim 3, comprising a means (22) for discharging the time constant circuit once the first switch (TREC) is switched off and the voltage flowing on the circuit reaches the threshold voltage of the diode. A coil switching device characterized in that. 제 1 항에 있어서, 임피던스가 전류원임을 특징으로 하는 코일 스위칭 장치.A coil switching device according to claim 1, wherein the impedance is a current source. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890003291A 1988-03-18 1989-03-16 Coil switching device KR890015251A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8803899A FR2628877B1 (en) 1988-03-18 1988-03-18 DEVICE FOR SWITCHING A COIL
FR63-03899 1988-03-18

Publications (1)

Publication Number Publication Date
KR890015251A true KR890015251A (en) 1989-10-28

Family

ID=9364621

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890003291A KR890015251A (en) 1988-03-18 1989-03-16 Coil switching device

Country Status (7)

Country Link
US (1) US5016122A (en)
EP (1) EP0334775B1 (en)
JP (1) JP2863187B2 (en)
KR (1) KR890015251A (en)
AT (1) ATE95938T1 (en)
DE (1) DE68909821T2 (en)
FR (1) FR2628877B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241430A (en) * 1990-10-05 1993-08-31 Seagate Technology, Inc. Method and apparatus for alternatively reading or writing data to a servo surface of a hard disk drive
FR2668645B1 (en) * 1990-10-29 1994-09-23 Sgs Thomson Microelectronics DEVICE FOR SWITCHING A COIL.
FR2694470B1 (en) * 1992-07-31 1994-11-10 Sgs Thomson Microelectronics Write / read switching device for a VCR head.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869717A (en) * 1971-06-18 1975-03-04 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing apparatus for multi-channel endless tape
GB1391342A (en) * 1971-06-18 1975-04-23 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing apparatus for 2- or 4- channel multi-track endless tape
US3824623A (en) * 1972-12-14 1974-07-16 Potter Instrument Co Inc System for reducing cross talk of unselected magnetic heads into a selected head
FR2322426A1 (en) * 1975-08-28 1977-03-25 Sharp Kk SYSTEM FOR DETECTION OF AN UNREGISTERED SECTION IN A TAPE RECORDING DEVICE
US4044387A (en) * 1975-09-02 1977-08-23 Sperry Rand Corporation Magnetic head switching system
DE2827028C3 (en) * 1978-06-20 1981-01-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for the protection of data stored on a magnetic recording medium
US4605974A (en) * 1982-11-24 1986-08-12 Matsushita Electric Industrial Co., Ltd. Magnetic recording and reproducing apparatus
US4665446A (en) * 1983-10-06 1987-05-12 Canon Kabushiki Kaisha Magnetic recording and reproducing apparatus

Also Published As

Publication number Publication date
FR2628877A1 (en) 1989-09-22
EP0334775B1 (en) 1993-10-13
US5016122A (en) 1991-05-14
JPH01276818A (en) 1989-11-07
FR2628877B1 (en) 1990-08-24
DE68909821D1 (en) 1993-11-18
JP2863187B2 (en) 1999-03-03
EP0334775A1 (en) 1989-09-27
ATE95938T1 (en) 1993-10-15
DE68909821T2 (en) 1994-05-05

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WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid